Qi Jin

Profile

Software engineer with 3+ years of experience building automation, internal platforms, and developer tooling.

About me

I am a software engineer with 3+ years of experience building automation, release infrastructure, and developer tooling for mobile engineering teams. My work has focused on improving reliability, performance, and developer velocity through workflow redesign, system improvements, and measurable operational gains. I also enjoy translating complex technical ideas into clear explanations and helping teams improve how software is built and delivered.

Details

Name:

Qi Jin

Role:

Software Engineer

Location:

Chicago, Illinois, United States

Experience

Experience highlights focused on reliability, automation, and measurable delivery impact.

Education

University of Illinois Urbana-Champaign

Jan 2021 - Dec 2022

M.S. in Biological and Computer Engineering

Relevant coursework included database systems, parallel computer architecture, applied parallel programming, artificial intelligence, programming languages and compilers, and system programming. This experience strengthened both my software foundation and my interest in practical technical problem-solving.

Champaign, IL, US

Zhejiang University

Sep 2016 - Jun 2020

B.S. in Biological Engineering

My undergraduate studies built my foundation in data structures, algorithms, statistics, and computational thinking. During this period, I first became interested in software development and the broader possibilities of AI and machine learning.

Zhejiang, China

Professional Experience

PayPal

Feb 2023 - Present

Software Engineer

Designed and deployed a consistent-hashing scheduler that reduced CI queue volume by 93% and cut average wait time by 99% to under 0.3 seconds. I also led large-scale Jenkins-to-Harness migrations, consolidated release workflows, and built developer-productivity tooling adopted across hundreds of mobile pipelines.

Chicago, IL, US

Venmo

May 2022 - Aug 2022

Software Engineer Intern

Improved mobile CI pipelines through performance tuning and bug fixes, built end-to-end Android UI and API tests for critical user flows, and expanded automated coverage on AWS Device Farm to improve reliability and device-level visibility.

San Jose, CA, US

NetEase

May 2021 - Aug 2021

iOS Software Engineer Intern

Developed iOS product features in Objective-C, refactored code into MVC architecture, integrated third-party APIs, and improved maintainability through cleaner structure and stronger testing support.

Zhejiang, China

Skills

Selected projects that emphasize practical problem solving and clear technical execution.

Technical Skills

Python Strong
Kotlin Strong
JavaScript Strong
SQL Strong
C++ Advanced
Objective-C Advanced

Jenkins Strong
Harness Strong
Docker Advanced
Git Strong
AWS Device Farm Advanced
Release Engineering & CI/CD Professional

Languages

Chinese (Native) Native

English (Professional working proficiency) Professional

Focus Areas

Automation Professional
Internal Platforms Professional
Developer Productivity Professional

Observability Strong
Test Infrastructure Professional
Mobile Systems Strong

Projects

Selected work that reflects both technical foundations and supporting portfolio content.

Simon — Interactive Resume

A refreshed resume-style personal site that combines professional experience, technical skills, and a clearer presentation of my background.

**Tags:**
Resume, Personal Site, Front-end
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Course Portfolio

Selected AI/ML coursework artifacts organized into a portfolio-style site. This is supporting material rather than my main professional entry point.

**Tags:**
Coursework, Portfolio, Supporting Material
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